Electricity rates for Texas usually are quoted from 5.54 to 14.34 cents a kilowatt hour depending on market conditions and the locale, these prices will not be guaranteed and are only examples.
Plugged appliances still up energy when they are switched off so you need to make sure that they are unplugged after making use of. This may be a mistake that a lot of homeowners make so if you really wanted to save quite a few energy, you should unplug your home appliances.
Most people don't really pay too much attention on lighting since they believe that your lights are not taking in a lot of energy. Lights can have a huge effect on your monthly bills as they can consume a lot of energy when they are used often. In case you are using incandescent bulbs, you need to substitute them immediately with CFL or LED bulbs.